Siemens SIMATIC S7-1200 Manuel - Page 20

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Siemens SIMATIC S7-1200 Manuel
3 Mode of Operation

FC "ReadWrite"

3.5
This function gives individual access to all registers of an ebm-papst fan. To
operate the block, you have to be familiar with the MODBUS parameter
specification for "ebm-papst series 84 / 112 / 150 / 200" V5.00. The FC "ReadWrite
is only functional in connection with the FB "EbmPapst".
It is called in the cyclic organization block "Main".
Figure 3-4: FC "ReadWrite"
Table 3-13: Parameters of FC "ReadWrite"
Name
P type
holding
IN
write
IN
addr
IN
len
IN
lastFan
IN
busy
OUT
done
OUT
Controlling several fans (ebm-papst) via Modbus RTU
Entry ID: 109476801,
V2.0,
Data type
Register type (false = input register; true = holding register)
Bool
Only relevant for holding registers (false = read; true = write)
Bool
Start address in the slave: Defines the start address of the data
UInt
to access:
53248 through 53286 (16#D000 through 16#D026) for
input registers (holding = false)
53248 to 53258 (16#D000 to 16#D00A) /
53504 to 53674 (16#D100 to 16#D1AA)
for holding registers (holding = true)
Data length: Defines the number of words which this request
USInt
shall access (a maximum of 9 words is possible due to the
slave)
Last fan to be addressed (same parameter as FB "EbmPapst");
USInt
serves for limiting the "fanNumber"
FC "ReadWrite" is being edited
Bool
FC "ReadWrite" was completed without errors (active for one
Bool
cycle)
09/2018
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